Hi there xmas46car, my favourite physics would have to be quantum mechanics because things get a little crazy when we study things that small. The idea behind physics is that we can find general laws for our universe, but things don’t always act the same. For example, the gravity on earth is more compared to when you are on mars, so while it may look like the physics may be different on other planets the general laws are still the same as gravity is dependant on the mass and the size of the planet. I hope this answers your question, but if you have more feel free to ask away.
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